Hi
There is a bike shop in Darlington that has a couple in but they may be an old model (if there is such a thing?) cos they have had them in for a while. Not sure of the size but they were too small for me and I would go for a Large probably depnding on sizing.
They may do you a deal and post you one out if they want rid.
The shop is called The Iron Horse Cyclery 01325 284500.
Cheers
Steve